WO2021029125A1 - 端末、基地局、送信方法及び受信方法 - Google Patents
端末、基地局、送信方法及び受信方法 Download PDFInfo
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- WO2021029125A1 WO2021029125A1 PCT/JP2020/022199 JP2020022199W WO2021029125A1 WO 2021029125 A1 WO2021029125 A1 WO 2021029125A1 JP 2020022199 W JP2020022199 W JP 2020022199W WO 2021029125 A1 WO2021029125 A1 WO 2021029125A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2614—Peak power aspects
- H04L27/2621—Reduction thereof using phase offsets between subcarriers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
- H04L27/261—Details of reference signals
- H04L27/2613—Structure of the reference signals
- H04L27/26132—Structure of the reference signals using repetition
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0026—Division using four or more dimensions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0091—Signaling for the administration of the divided path
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/14—Spectrum sharing arrangements between different networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
- H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
- H04W72/1268—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of uplink data flows
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/53—Allocation or scheduling criteria for wireless resources based on regulatory allocation policies
Definitions
- This disclosure relates to terminals, base stations, transmission methods and reception methods.
- Release 16 NR is in the process of formulating specifications to expand the NR function.
- functional expansion for utilizing NR in the unlicensed frequency band (or unlicensed band) used in wireless systems such as WiFi (registered trademark) is being studied (see, for example, Non-Patent Document 1).
- the unlicensed frequency band is a band that does not require a radio station license (for example, called a license-free band) if certain conditions are met. Further, the function expansion (or operation) in the unlicensed frequency band is also called, for example, "NR-U: NR Unlicensed".
- NR-U is effective as a complementary tool for traffic offload to accommodate the rapidly increasing traffic in cellular communication.
- the non-limiting examples of the present disclosure contribute to the provision of terminals, base stations, transmission methods and reception methods that can improve frequency utilization efficiency in wireless communication.
- the terminal applies a control circuit that applies a coefficient pattern associated with the second information to the first information arranged in a plurality of frequency resources, and the pattern.
- a transmission circuit for transmitting the first information is provided.
- frequency utilization efficiency in wireless communication can be improved.
- Flowchart showing an example of terminal operation Diagram showing an example of PUCCH format 1 The figure which shows the application example of the pattern using the cyclic shift series The figure which shows the application example of the pattern using a phase rotation The figure which shows the application example of the pattern using a series number The figure which shows an example of the correspondence between an information bit and a pattern Diagram showing an example of peak transmission signal power to average power ratio characteristics The figure which shows the application example of the pattern which concerns on variation 2
- Interlaced allocation For uplink transmission in the unlicensed frequency band, for example, it is assumed that the transmission bandwidth (for example, OCB: Occupied Channel Bandwidth) of the terminal (for example, UE: also called User Equipment) is limited to the specified bandwidth or more. Will be done.
- OCB Occupied Channel Bandwidth
- UE also called User Equipment
- interlaced allocation also referred to as interlaced transmission
- the channel for uplink transmission may include, for example, an uplink data channel (for example, PUSCH: Physical Uplink Shared Channel) or an uplink control channel (for example, PUCCH: Physical Uplink Control Channel).
- transmission units for example, referred to as "interlace" in uplink transmission are each arranged at equal intervals (or unequal intervals) in the frequency direction within the system band (for example, for example). It consists of resources in (called a cluster). Each cluster is composed of, for example, one or more contiguous frequency units.
- the frequency unit may be, for example, a resource block (RB: Resource Block or PRB: Physical RB) or a subcarrier.
- FIG. 1 shows an example of interlaced configuration.
- the system band is 20 MHz
- the subcarrier interval is 30 kHz
- 1RB is composed of 12 subcarriers
- 1 interlace is composed of 10RB (in other words, 10 clusters).
- the system band is composed of 20 MHz (for example, 50 RB)
- five interlaces # 0 to # 4 can be configured.
- each of the 10 clusters is composed of 5 consecutive RBs.
- each of interlaces # 0 to # 4 includes RBs evenly spaced every 5 RBs in the frequency domain.
- the number of RBs (in other words, the number of clusters) constituting one interlace is not limited to 10, and may be another number. Further, the number of RBs included in each cluster (in other words, the number of interlaces) is not limited to 5, and may be another number.
- Uplink Control Information In NR, the terminal uses an uplink control channel (eg, PUCCH) to transmit uplink control information (UCI) to a base station (also referred to as gNB or eNB).
- the UCI includes, for example, a response signal (for example, ACK / NACK: Acknowledgement / Negative Acknowledgement, or HARQ-ACK) indicating an error detection result of a downlink data signal (for example, PDSCH: Physical Downlink Shared Channel), and a downlink.
- Channel State Information eg, CSI: Channel State Information
- uplink radio resource allocation request eg, SR: Scheduling Request
- the signal format when the terminal transmits 1 or 2 bit UCI is also called PUCCH format 0 (for example, also called NR PUCCH format 0) or PUCCH format 1 (for example, NR PUCCH format 1). ) Is used (see, for example, Non-Patent Document 2 or 3).
- PUCCH format 0 is composed of, for example, 1 or 2 symbols
- PUCCH format 1 is composed of, for example, any of 3 to 14 symbols.
- PUCCH format 0 and PUCCH format 1 are composed of 1 RB, for example, the OCB requirement in the unlicensed frequency band cannot be satisfied.
- PUCCH format 0 and PUCCH format 1 are extended to interlaced allocation.
- the terminal repeatedly arranges the PUCCH format 0 or PUCCH format 1 signal composed of 1RB in a plurality of PRBs included in the interlace (interlace # 0 in the example of FIG. 2).
- a method of transmission can be envisioned.
- one terminal occupies more radio resources compared to NR (eg, 1PRB) because it transmits 1 or 2 bits of information bits. Therefore, the frequency utilization efficiency may decrease.
- NR eg, 1PRB
- Multi-Carrier Code Division Multiple Access for example, OCC: Orthogonal Cover Code
- OCC Orthogonal Cover Code
- MC-CDMA see, for example, Non-Patent Document 5
- the signals of a plurality of terminals can be multiplexed with the same time and frequency resources by the orthogonal diffusion code, so that the frequency utilization efficiency can be improved.
- the unlicensed frequency band is expected to be applied to small cells, for example. It is assumed that the number of terminals in the small cell is smaller than the number of terminals in the macro cell. Therefore, in the unlicensed frequency band, it is difficult to obtain the effect of improving the frequency utilization efficiency by multiplexing a plurality of terminals by MC-CDMA.
- the peak transmission signal power to average power ratio (PAPR: Peak-to-Average Power Ratio) of the terminal is used.
- CM Cubic Metric
- PAPR / CM Cyclic Shict series, phase rotation, or series number switching (in other words, cycling) has been studied (see, for example, Non-Patent Document 4).
- the terminal repeatedly arranges and transmits the same signal to a plurality of frequency resources (for example, each RB on the interlace).
- a signal that is repeatedly arranged in a plurality of frequency resources is defined as a "basic transmission unit" (for example, a basic unit).
- a signal of a unit (or a transmission unit) that is repeatedly arranged in a plurality of frequency resources may be defined by a name different from that of the "basic transmission unit".
- the basic transmission unit may be, for example, a PUCCH format 0 or PUCCH format 1 signal composed of 1 RB that transmits 1 or 2 bits.
- the basic transmission unit is not limited to PUCCH format 0 and PUCCH format 1, and may be other signals.
- it may be a signal of another PUCCH format defined in NR or LTE, or may be another channel different from PUCCH (for example, PUSCH or PRACH: Physical Random Access Channel).
- a cyclic shift amount or a phase rotation amount is applied to each of a plurality of frequency resources in which the basic transmission unit is repeatedly arranged.
- the series number of the transmission series may be set for each of a plurality of frequency resources in which the basic transmission unit is repeatedly arranged. The increase in PAPR / CM can be suppressed by applying the cyclic shift amount, phase rotation amount, or series number of the transmission series to each of the plurality of frequency resources.
- a set in other words, a cyclic shift amount), a phase rotation amount, or a sequence number of a transmission sequence applied to each of a plurality of frequency resources (in other words).
- the element string is defined as a "pattern".
- the pattern is a pattern of coefficients (eg, cyclic shift sequence, phase rotation amount or transmission sequence) applied (in other words, multiplied) to the basic transmit unit.
- the pattern has 10 elements (eg, 10 clusters) applied to each RB. , Circular shift amount, phase rotation amount or series number).
- the terminal selects one pattern from a plurality of patterns and transmits a signal based on the selected pattern. For example, information bits are assigned to each of the plurality of patterns. By allocating the information bits, the terminal can transmit the information bits by selecting a pattern in addition to the information bits transmitted by the basic transmission unit, for example, so that the frequency utilization efficiency can be improved. Further, the plurality of patterns that can be selected by the terminal may be, for example, a pattern that suppresses the increase in PAPR / CM.
- the communication system includes a base station 100 and a terminal 200.
- FIG. 3 is a block diagram showing a partial configuration example of the base station 100 according to the embodiment of the present disclosure.
- the receiving unit receives the first information (for example, the basic transmitting unit) arranged in a plurality of frequency resources (for example, RB included in the interlace). To do.
- the control unit detects the second information associated with the coefficient pattern applied to the first information.
- FIG. 4 is a block diagram showing a partial configuration example of the terminal 200 according to the embodiment of the present disclosure.
- the control unit for example, corresponding to a control circuit
- the transmission unit (for example, corresponding to a transmission circuit) transmits the first information.
- the "coefficient pattern” may be, for example, a pattern including a cyclic shift amount, a phase rotation amount, or a series number of a transmission series as an element.
- FIG. 5 is a block diagram showing a configuration example of the base station 100 according to the first embodiment.
- the base station 100 includes a control unit 101, an upper control signal generation unit 102, a downlink control information generation unit 103, an encoding unit 104, a modulation unit 105, a signal allocation unit 106, and a transmission unit. It has 107, a receiving unit 108, an extracting unit 109, a demodulation unit 110, and a decoding unit 111.
- the control unit 101, the demodulation unit 110, and the decoding unit 111 shown in FIG. 5 may correspond to the control unit shown in FIG. 3, and the receiving unit 108 shown in FIG. 5 may correspond to the receiving unit shown in FIG.
- the control unit 101 determines, for example, setting information including upper layer parameters for the terminal 200 (for example, referred to as RadioResourceControl (RRC) setting information), and the determined RRC setting information is used in the upper control signal generation unit 102 and the extraction unit. Output to 109, demodulation unit 110, and decoding unit 111.
- RRC RadioResourceControl
- the RRC setting information may include, for example, setting information regarding a method of transmitting information bits.
- the settings related to the transmission method of the information bits include, for example, information on the transmission parameters used to generate the "basic transmission unit", information on the information bits to be transmitted using the "pattern", information on the number of bits of the information bits, and settings in the terminal 200.
- Information such as information about the pattern to be generated and information about the correspondence between the information bit and the pattern may be included.
- control unit 101 determines information regarding a downlink data signal (for example, PDSCH), an upper control signal, or a downlink control signal for transmitting downlink control information (for example, DCI).
- the information regarding the downlink signal may include, for example, information such as a coding / modulation scheme (MCS: Modulation and Coding Scheme) and radio resource allocation.
- MCS Modulation and Coding Scheme
- the control unit 101 outputs, for example, the determined information to the coding unit 104, the modulation unit 105, and the signal allocation unit 106. Further, the control unit 101 outputs information about the downlink signal to the downlink control information generation unit 103.
- control unit 101 determines information for the terminal 200 to transmit ACK / NACK for the downlink data, and outputs the determined information to the downlink control information generation unit 103 and the extraction unit 109.
- the information for transmitting the ACK / NACK may include, for example, information about the PUCCH resource.
- control unit 101 determines the information for the terminal 200 to transmit the uplink data, and outputs the determined information to the downlink control information generation unit 103, the extraction unit 109, the demodulation unit 110, and the decoding unit 111.
- the information for transmitting the uplink data may include, for example, a coding / modulation method and radio resource allocation.
- the upper layer control signal generation unit 102 generates an upper layer control signal bit string based on the information input from the control unit 101 (for example, RRC setting information), and outputs the upper layer control signal bit string to the coding unit 104.
- the downlink control information generation unit 103 generates a downlink control information (for example, DCI) bit string based on the information input from the control unit 101, and outputs the generated DCI bit string to the coding unit 104.
- control information may be transmitted to a plurality of terminals. Therefore, the downlink control information generation unit 103 may scramble the PDCCH that transmits the DCI with the identification information unique to the terminal.
- the terminal-specific identification information may be any of information such as C-RNTI (Cell Radio Network Temporary Identifier) and MCS-C-RNTI (Modulation and Coding Scheme C-RNTI), and other information ( For example, another RNTI) may be used.
- the coding unit 104 generates downlink data (for example, downlink UP data) and higher control signal generation based on information input from the control unit 101 (for example, information on the coding rate).
- the bit string input from the unit 102 or the DCI bit string input from the downlink control information generation unit 103 is encoded.
- the coding unit 104 outputs the coded bit string to the modulation unit 105.
- the modulation unit 105 modulates the coded bit string input from the coding unit 104 based on the information input from the control unit 101 (for example, information about the modulation method), and the modulated signal (for example, the modulation method).
- the symbol string is output to the signal allocation unit 106.
- the signal allocation unit 106 maps a symbol string (including, for example, downlink data or a control signal) input from the modulation unit 105 to the radio resource based on the information indicating the radio resource input from the control unit 101.
- the signal allocation unit 106 outputs a downlink signal to which the signal is mapped to the transmission unit 107.
- the transmission unit 107 performs transmission waveform generation processing such as, for example, Orthogonal Frequency Division Multiplexing (OFDM) on the signal input from the signal allocation unit 106. Further, in the case of OFDM transmission to which a cyclic prefix (CP) is added, the transmission unit 107 performs an inverse fast Fourier transform (IFFT) process on the signal and adds the CP to the signal after IFFT. .. Further, the transmission unit 107 performs RF processing such as D / A conversion and up-conversion on the signal, and transmits the radio signal to the terminal 200 via the antenna.
- OFDM Orthogonal Frequency Division Multiplexing
- IFFT inverse fast Fourier transform
- RF processing such as D / A conversion and up-conversion
- the receiving unit 108 performs RF processing such as down-covering or A / D conversion on the uplink signal from the terminal 200 received via the antenna. Further, in the case of OFDM transmission, the receiving unit 108 performs a fast Fourier transform (FFT) process on the received signal and outputs the obtained frequency domain signal to the extraction unit 109.
- FFT fast Fourier transform
- the extraction unit 109 Based on the information input from the control unit 101, the extraction unit 109 extracts the radio resource portion to which the uplink signal transmitted by the terminal 200 is transmitted, and outputs the extracted radio resource portion to the demodulation unit 110.
- the demodulation unit 110 outputs a signal (for example, at least one of UCI and uplink data) input from the extraction unit 109 based on the information input from the control unit 101 (for example, information about the basic transmission unit and the pattern). Demodulate.
- the demodulation unit 110 detects, for example, a pattern applied to a signal input from the extraction unit 109. Further, the demodulation unit 110 detects (in other words, demodulates) the information bit (second information) associated with the detected pattern. Further, the demodulation unit 110 demodulates the basic transmission unit included in the signal input from the extraction unit 109, for example, and obtains the demodulation result regarding the first information.
- the demodulation unit 110 outputs, for example, the demodulation result to the decoding unit 111.
- the decoding unit 111 performs UCI and based on the information input from the control unit 101 and the demodulation result input from the demodulation unit 110 (the demodulation result regarding the first information, the demodulation result regarding the second information, or both). At least one error correction decoding of the uplink data is performed to obtain a received bit sequence after decoding. Note that the decoding unit 111 does not have to perform error correction decoding for the UCI transmitted without performing error correction coding.
- FIG. 6 is a block diagram showing a configuration example of the terminal 200 according to the embodiment of the present disclosure.
- the terminal 200 includes a receiving unit 201, an extraction unit 202, a demodulation unit 203, a decoding unit 204, a control unit 205, a coding unit 206, a modulation unit 207, and a signal allocation unit 208.
- the control unit 205, the coding unit 206, the modulation unit 207, and the signal allocation unit 208 shown in FIG. 6 correspond to the control unit shown in FIG. 4, and the transmission unit 209 shown in FIG. 6 corresponds to the transmission unit shown in FIG. May correspond to.
- the receiving unit 201 receives the downlink signal (for example, downlink data or downlink control information) from the base station 100 via the antenna, and performs RF processing such as down-covering or A / D conversion on the wireless reception signal. To obtain a received signal (baseband signal). Further, when receiving the OFDM signal, the receiving unit 201 performs FFT processing on the received signal and converts the received signal into a frequency domain. The receiving unit 201 outputs the received signal to the extraction unit 202.
- the downlink signal for example, downlink data or downlink control information
- RF processing such as down-covering or A / D conversion on the wireless reception signal.
- baseband signal baseband signal
- the receiving unit 201 performs FFT processing on the received signal and converts the received signal into a frequency domain.
- the receiving unit 201 outputs the received signal to the extraction unit 202.
- the extraction unit 202 extracts a radio resource portion that can include the downlink control information from the received signal input from the reception unit 201 based on the information regarding the radio resource of the downlink control information input from the control unit 205. Then, it is output to the demodulation unit 203. Further, the extraction unit 202 extracts the radio resource portion including the downlink data based on the information regarding the radio resource of the data signal input from the control unit 205, and outputs the radio resource portion to the demodulation unit 203.
- the demodulation unit 203 demodulates the signal input from the extraction unit 202 and outputs the demodulation result to the decoding unit 204.
- the decoding unit 204 performs error correction decoding on the demodulation result input from the demodulation unit 203, and obtains, for example, downlink reception data, an upper layer control signal, or downlink control information.
- the decoding unit 204 outputs the upper layer control signal and the downlink control information to the control unit 205, and outputs the downlink reception data. Further, the decoding unit 204 may generate ACK / NACK based on the decoding result of the downlink received data. ACK / NACK may be output to, for example, the coding unit 206.
- the control unit 205 determines, for example, information on the basic transmission unit and the pattern based on the setting information on the transmission method of the information bits included in the upper layer control signal information input from the decoding unit 204, and determines the determined information. Output to the coding unit 206, the modulation unit 207, and the signal allocation unit 208.
- control unit 205 determines the information regarding the transmission of the uplink signal, and outputs the determined information to the coding unit 206 and the signal allocation unit 208. Further, the control unit 205 determines the information regarding the reception of the downlink signal, and outputs the determined information to the extraction unit 202.
- the coding unit 206 encodes at least one signal of UCI or uplink data based on the information input from the control unit 205 (for example, information about the basic transmission unit), and outputs the coded bit string to the modulation unit 207. To do.
- the terminal 200 may transmit an uplink signal (for example, UCI) without performing error correction coding in the coding unit 206.
- the modulation unit 207 modulates the coded bit string input from the coding unit 206 based on the information input from the control unit 205, and outputs the modulated signal (symbol string) to the signal allocation unit 208.
- the modulation unit 207 may generate a basic transmission unit based on the bit sequence transmitted in the basic transmission unit and output it to the signal allocation unit 208. Further, the modulation unit 207 selects a pattern based on the bit string of the bit sequence transmitted by the pattern, and outputs information about the selected pattern to the signal allocation unit 208.
- the signal allocation unit 208 maps the signal input from the modulation unit 207 to the radio resource based on the information input from the control unit 205, and outputs the uplink signal to which the signal is mapped to the transmission unit 209. For example, the signal allocation unit 208 may repeatedly arrange the basic transmission unit on a plurality of frequency resources (for example, interlace). Further, the signal allocation unit 208 may apply a pattern (for example, a cyclic shift amount, a phase rotation amount, or a series number) to a basic transmission unit assigned to a plurality of frequency resources.
- a pattern for example, a cyclic shift amount, a phase rotation amount, or a series number
- the transmission unit 209 generates a transmission signal waveform such as OFDM for the signal input from the signal allocation unit 208. Further, in the case of OFDM transmission using CP, the transmission unit 209 performs IFFT processing on the signal and adds CP to the signal after IFFT. Alternatively, when the transmission unit 209 generates a single carrier waveform, a DFT (Discrete Fourier Transform) unit may be added after the modulation unit 207 or before the signal allocation unit 208 (not shown). Further, the transmission unit 209 performs RF processing such as D / A conversion and up-conversion on the transmission signal, and transmits the radio signal to the base station 100 via the antenna.
- a DFT Discrete Fourier Transform
- FIG. 7 is a flowchart showing an example of the operation of the terminal 200 according to the present embodiment.
- the terminal 200 acquires, for example, setting information regarding a method of transmitting information bits (ST101).
- the setting information may be set in the terminal 200 from the base station 100 by a control signal such as an upper layer parameter (for example, an RRC parameter) or DCI, or may be preset in the terminal 200 according to a standard.
- the setting information regarding the transmission method of the information bits includes, for example, information regarding the transmission parameters used to generate the "basic transmission unit", information regarding the information bits and the number of bits to be transmitted using the "pattern", and information set in the terminal 200. Information such as information on the pattern or information on the correspondence between the information bit and the pattern may be included.
- the information bit may be UCI such as ACK / NACK, SR or CSI described above, uplink U-plane data, or other information.
- the terminal 200 generates an information bit (ST102).
- the terminal 200 generates a basic transmission unit based on, for example, setting information regarding a method of transmitting information bits and the generated information bits (ST103).
- the terminal 200 arranges a basic transmission unit for each of a plurality of frequency resources (for example, interlace) (ST104). Further, the terminal 200 applies a pattern to the basic transmission units arranged in each of the plurality of frequency resources, for example, based on the setting information regarding the transmission method of the information bits (ST104).
- a basic transmission unit for each of a plurality of frequency resources for example, interlace
- the basic transmission unit In the terminal 200, the basic transmission unit generates a transmission signal including signals arranged in a plurality of frequency resources and transmits the transmission signal to the base station 100 (ST105).
- the basic transmission unit may be a signal in a signal format that transmits 1 or 2 bits, such as PUCCH format 0 or PUCCH format 1 defined in Release 15 NR.
- the basic transmission unit is not limited to the above, and may be, for example, a signal in another PUCCH format defined in NR or LTE, or a signal in a signal format of another channel (for example, PUSCH or PRACH). Further, the number of information bits transmitted by the basic transmission unit is not limited to 1 or 2 bits.
- the transmitting side eg, terminal 200
- 1RB eg, 12 subcarriers
- cyclic shift sequences eg, sequence length 12
- the receiving side demodulates the information bits based on the cyclic shift sequence by, for example, maximum likelihood determination using correlation processing.
- a constant amplification zero autocorrelation (CAZAC) series may be used.
- the CAZAC series has low PAPR characteristics.
- the terminal 200 may repeatedly transmit the above configuration for two symbols. At this time, frequency hopping may be applied between the two symbols.
- the PUCCH format 1 signal is composed of, for example, 4 to 14 OFDM symbols and 1 RB (eg, 12 subcarriers).
- a modulation signal based on ACK / NACK is multiplied.
- 1-bit ACK / NACK is multiplied by a modulated signal based on binary phase shift keying (BPSK)
- 2-bit ACK / NACK is multiplied by a modulated signal based on quadrature phase shift keying (QPSK).
- BPSK binary phase shift keying
- QPSK quadrature phase shift keying
- the modulation signal for example, ACK / NACK
- OCC Orhotogonal Cover Code
- RS Reference Signal
- DMRS Demodulation reference signal
- OCC orthogonal diffusion code
- the first OFDM symbol number in the slot is set to "0".
- the CAZAC series may be used for the cyclic shift series.
- FIG. 8 shows the configuration of PUCCH format 1 of the 4OFDM symbol.
- UCI for example, ACK / NACK information
- reference signals are arranged at the 0th and 2nd even-numbered OFDM symbols.
- frequency hopping may be applied in PUCCH format 1.
- frequency hopping By applying frequency hopping, the reception characteristics due to frequency diversity can be improved.
- the basic transmission unit is not limited to PUCCH format 0 or PUCCH format 1 composed of 1RB, and may have other configurations.
- the sequence length of PUCCH format 0 or PUCCH format 1 may be longer than 12 (for example, 24), and the basic transmission unit may be composed of a plurality of RBs.
- the basic transmission unit may be generated based on a format in which a plurality of RBs are used (for example, PUCCH format 2 or PUCCH format 3) (see, for example, Non-Patent Document 2 or 3).
- the basic transmission unit is not limited to the PUCCH format, and may be generated based on the transmission format of another channel.
- a basic transmit unit may be generated based on PUSCH or PRACH.
- the terminal 200 for example, repeatedly arranges the generated basic transmission unit on a plurality of frequency resources (for example, each RB included in the interlace).
- the terminal 200 applies a pattern (for example, an element such as a cyclic shift amount, a phase rotation amount, or a series number) to a basic transmission unit arranged in each of a plurality of frequency resources.
- a pattern for example, an element such as a cyclic shift amount, a phase rotation amount, or a series number
- the terminal 200 repeatedly arranges the basic transmission unit on a plurality of frequency resources, and for the frequency domain signal after applying the pattern, for example, an inverse discrete Fourier transform (IDFT) or an inverse fast Fourier transform (IDFT).
- IDFT inverse discrete Fourier transform
- IDFT inverse fast Fourier transform
- IFFT Inverse Fast Fourier Transform
- a pattern is a set including elements (for example, cyclic shift amount, phase rotation amount, or series number) corresponding to each of a plurality of frequency resources.
- the pattern contains as many elements as the number of frequency resources (eg, RBs included in the interlace) in which the basic transmit unit is repeatedly placed.
- 9, 10 and 11 show an example of applying a pattern including a cyclic shift amount, a phase rotation amount, and a series number as elements when PUCCH format 0 or PUCCH format 1 is used as a basic transmission unit. ..
- FIG. 9 shows an example when a pattern including the cyclic shift amount as an element is applied.
- N 10 because one interlace is composed of 10 RB.
- M RB is an applicable cyclic shift amount (for example, an upper limit value).
- M RB is an applicable cyclic shift amount (for example, an upper limit value).
- FIG. 10 shows an example in which a pattern including the amount of phase rotation is applied.
- the terminal 200 multiplies the basic transmission unit arranged in the nth frequency resource by the phase rotation amount ⁇ n corresponding to the nth element of the pattern.
- FIG. 11 shows an example when a pattern including a series number as an element is applied.
- N 10 because one interlace is composed of 10 RB.
- the series number "Z n " corresponding to the nth element of the pattern may be set to the series number u'(n) in the nth frequency resource.
- the sequence number u'(n) in the nth frequency resource may be expressed by the following equation (3) instead of the equation (2).
- u'(n) Z n (3)
- the terminal 200 transmits the information bits included in the basic transmission unit and the information bits associated with the pattern to the base station 100.
- the terminal 200 explicitly transmits the information bit (for example, the first information) to the base station 100 by the basic transmission unit, and implicitly transmits the information bit (for example, the second information) by selecting a pattern. It is transmitted to the base station 100.
- the set of patterns applicable to the terminal 200 (in other words, the pattern candidate group) and the correspondence between each pattern and the information bit (column) may be predetermined by, for example, an RRC parameter or DCI.
- the base station 100 may be set (in other words, notified) from the base station 100 to the terminal 200 by a control signal such as.
- FIG. 12 shows an example of the correspondence between the pattern and the information bits transmitted from the terminal 200 to the base station 100 by the pattern.
- the terminal 200 may be set with a set including 2 M patterns.
- Information bits are associated with each of the 2 M patterns.
- the pattern is, for example, a set including the cyclic shift amount, the phase rotation amount, or the series number applied to each frequency resource as an element.
- a CAZAC series with a series length of 12 can be applied to the basic transmission unit.
- N 10 RB
- U 30 CAZAC series will be prepared.
- the number of patterns that can be generated in the terminal 200 is 12 N in the pattern using the cyclic shift series, and X N in the pattern using the phase rotation, where X is the number of candidates for the phase rotation amount.
- the pattern using the series number there are 30 N pieces.
- not all patterns are suitable for repeated transmission of the basic transmission unit and transmission of information bits associated with the patterns.
- the patterns that can be used by the terminal 200 or the patterns that are assigned to the terminal 200 for example, there is room for consideration of suppressing the increase in PAPR / CM of the transmission signal.
- the base station 100 determines the pattern corresponding to the information bit transmitted by the terminal 200. Therefore, regarding the patterns that can be used by the terminal 200 or the patterns that are assigned to the terminal 200, for example, there is room for examining the reception performance of the base station 100.
- FIG. 13 shows an example of PAPR characteristics when a pattern using a cyclic shift sequence is applied to the repeated transmission of the basic transmission unit.
- the horizontal axis shows the PAPR value (dB)
- the vertical axis shows the complementary cumulative probability distribution (CCDF: Complementary Comulative Distribution Function).
- CCDF Complementary Comulative Distribution Function
- FIG. 13 shows an example of PAPR characteristics when the following six patterns are applied to interlace # 0 among the five interlaces # 0 to # 4 shown in FIG. 1, for example.
- Pattern # 1 (represented as P1): [0 1 2 3 4 5 6 7 8 9]
- Pattern # 2 (represented as P2): [0 2 4 6 8 10 0 2 4 6]
- Pattern # 3 (represented as P3): [0 3 6 9 0 3 6 9 0 3]
- Pattern # 4 represented as P4): [0 4 8 0 4 8 0 4 8 0]
- Pattern # 5 represented as P5
- Pattern # 6 (represented as P6): [0 6 0 6 0 6 0 6 0 6]
- pattern # 1 and pattern # 5 have lower PAPR characteristics than other patterns # 2, # 3, # 4 and # 6.
- PAPR is larger in the order of pattern # 6, pattern # 4, pattern # 3, and pattern # 2.
- pattern # 6 includes two types of cyclic shift amounts of 0 and 6 each, whereas pattern # 1 and pattern # 5 include 10 types of cyclic shift amounts. Are included one by one.
- a pattern in which elements having the same value are not included in one pattern may be set in the terminal 200.
- the more elements of different values are included in one pattern the higher the effect of suppressing the increase in PAPR / CM by the pattern.
- the plurality of elements included in one pattern may have different values from each other, for example, the above-mentioned patterns # 1 or # 5.
- the same value does not have to be set for the elements between different patterns (for example, a plurality of candidate patterns).
- the elements between the plurality of patterns may have different values.
- the receiving side detects the pattern applied to the received signal in order to determine the information bit transmitted by the pattern.
- the base station 100 detects the pattern applied to the received signal in order to determine the information bit transmitted by the pattern.
- the base station 100 cannot distinguish which pattern the detected pattern is in the frequency resource. , The accuracy of pattern detection may decrease. Therefore, the reception performance of the information bit associated with the putter in the base station 100 may deteriorate.
- the base station 100 can distinguish which pattern the detected pattern is in the frequency resource, so that the pattern detection accuracy Can be improved. Therefore, the reception performance of the information bits associated with the pattern in the base station 100 can be improved.
- the basic transmission unit is generated based on PUCCH format 0 or PUCCH format 1, the smaller the sum of the cross-correlation between the patterns in the transmission series after applying the pattern, the better the reception performance in the base station 100 can be. ..
- the sum of cross-correlation becomes zero.
- the sum of cross-correlation becomes smaller as a different sequence number is set between different patterns in each frequency resource.
- the pattern for improving the reception performance of the base station 100 has been described above.
- FIGS. 9, 10 and 11 as an example, four types of patterns and four types of information (in other words, 2-bit information bits: 00, 01, 10 and 11) are associated with each other.
- the 10 cyclic shift amounts, which are elements included in each of the four types of patterns have different values.
- the 10 phase rotation amounts, which are elements included in each of the four types of patterns have different values.
- the ten series numbers, which are elements included in each of the four types of patterns have different values.
- the elements between the four types of patterns are different values from each other.
- the terminal 200 can suppress the increase in PAPR / CM of the transmission signal by applying each pattern shown in FIG. 9, FIG. 10 or FIG. 11 to the basic transmission unit. Further, the terminal 200 can improve the reception performance of the base station 100 by applying each pattern shown in FIG. 9, FIG. 10 or FIG. 11 to the basic transmission unit.
- the value is not limited to the case where a plurality of elements included in each pattern have different values, and for example, some elements may have the same value. Further, in each frequency resource, the value is not limited to the case where the elements between the plurality of patterns have different values, and for example, the elements between some patterns may have the same value.
- the value set for the element included in each pattern is a pattern (in other words, in other words, as shown in the examples of FIGS. 9, 10 and 11).
- the information bits may be determined based on the same law (which may be read as, for example, a rule, rule, regulation or setting).
- a plurality of patterns (for example, a plurality of candidates) are generated based on a common rule for the values of the information bits associated with the plurality of patterns.
- b indicates a value corresponding to the information bit string.
- the value of b may be the value X of each information bit shown in FIG.
- the value of the element corresponding to each frequency resource in the four patterns is set to a value shifted according to the value X of the information bit.
- the values X of the information bits associated with a plurality of patterns are different from each other, the values between the elements corresponding to each frequency resource of the plurality of patterns are different from each other. Therefore, by generating a pattern between different information bits based on the same law, it is possible to prevent the same value from being set for each element between the patterns.
- the pattern set in the terminal 200 is not limited to the method of being generated based on the same rule between different information bits, and may be generated based on another method.
- the terminal 200 transmits ACK / NACK in the basic transmission unit based on PUCCH format 0 or PUCCH format 1 and transmits SR by selecting a pattern.
- ACK / NACK is transmitted using PUCCH format 0, and the operation when the PUCCH resource assigned to ACK / NACK and the PUCCH resource set in SR overlap in time will be described.
- the terminal multiplexes ACK / NACK and SR to PUCCH and transmits them.
- the PUCCH resource is determined based on the PUCCH resource assigned to ACK / NACK (see, for example, Non-Patent Document 3). Further, in addition to the PUCCH resource assigned to ACK / NACK (for example, the cyclic shift amount), the PUCCH resource for notifying the presence / absence of SR (for example, the cyclic shift amount) is used. Therefore, in Release 15 NR, the number of multiple terminals for the same time frequency resource may decrease, and the frequency utilization efficiency may decrease.
- the terminal 200 generates a PUCCH format 0 signal for transmitting ACK / NACK in the basic transmission unit, for example, and determines whether or not SR is present in the generated basic transmission unit.
- the transmitted signal is transmitted to the base station 100 by applying the associated pattern.
- the number of information bits notified by the pattern is 1 bit (for example, with SR or without SR), and the number of patterns set in the terminal 200 is 2.
- an additional PUCCH resource for example, a patrol shift amount
- a patrol shift amount for notifying the presence / absence of the SR such as Release 15 NR becomes unnecessary. Therefore, in the present embodiment, it is possible to suppress a decrease in the number of multiple terminals for the same time frequency resource and suppress a decrease in frequency utilization efficiency.
- the PUCCH resource set in SR is PUCCH format 1
- ACK / NACK is transmitted using PUCCH format 1
- the PUCCH resource assigned to ACK / NACK and the PUCCH resource set in SR The operation when they overlap in time will be described.
- the terminal In Release 15 NR, the terminal multiplexes ACK / NACK and SR to PUCCH and transmits them. At this time, in the case of positive SR (for example, with SR), the terminal transmits ACK / NACK using the PUCCH resource set in SR. On the other hand, in the case of negative SR (for example, no SR), the terminal transmits ACK / NACK using the PUCCH resource assigned to ACK / NACK.
- the base station determines the presence or absence of SR based on, for example, the PUCCH resource in which ACK / NACK is actually transmitted (see, for example, Non-Patent Document 3). Therefore, in Release 15NR, the base station blindly detects, for example, the PUCCH resources for ACK / NACK and SR, so that the reception performance may deteriorate.
- the terminal 200 generates a PUCCH format 1 signal for transmitting ACK / NACK in the basic transmission unit, for example, and determines whether or not SR is present in the generated basic transmission unit.
- the transmitted signal is transmitted to the base station 100 by applying the associated pattern.
- the number of information bits notified by the pattern is 1 bit (for example, positive SR or negative SR), and the number of patterns set in the terminal 200 is 2.
- the base station 100 can receive the SR by detecting the pattern applied to the transmission signal from the terminal 200, so that blind detection in a plurality of PUCCH resources such as Release 15 NR becomes unnecessary. Become. Therefore, in the present embodiment, deterioration of reception performance in the base station 100 can be suppressed.
- the PUCCH resource set in SR is PUCCH format 0, ACK / NACK is transmitted using PUCCH format 1, and the PUCCH resource assigned to ACK / NACK and the PUCCH resource set in SR The operation when they overlap in time will be described.
- the terminal drops the SR transmission and transmits ACK / NACK using the PUCCH resource assigned to ACK / NACK (see, for example, Non-Patent Document 3). Therefore, in Release 15NR, SR is not transmitted, and the frequency utilization efficiency of the uplink may be deteriorated or delayed.
- the terminal 200 generates a PUCCH format 1 signal for transmitting ACK / NACK in the basic transmission unit, for example, and determines whether or not SR is present in the generated basic transmission unit.
- the associated pattern is applied and the transmission signal is transmitted to the base station 100.
- the number of information bits notified by the pattern is 1 bit (for example, positive SR or negative SR), and the number of patterns set in the terminal 200 is 2.
- the terminal 200 can transmit to the base station 100 according to the pattern without dropping the SR. Therefore, in the present embodiment, deterioration and delay of the frequency utilization efficiency of the uplink can be suppressed.
- the transmission example of the information bit based on the basic transmission unit and the pattern is not limited to the above-mentioned operation examples 1 to 3.
- the information transmitted by the pattern is not limited to SR, but may be ACK / NACK or CSI, or other information.
- the information transmitted by the basic transmission unit is not limited to ACK / NACK, but may be SR or CSI, or other information.
- the information bit is not limited to UCI such as ACK / NACK, SR or CSI, and may be uplink U-plane data.
- the terminal 200 associates the basic transmission unit (for example, the first information bit) arranged in a plurality of frequency resources such as interlace allocation with the second information bit.
- the transmitted signal is transmitted by applying the specified pattern.
- the base station 100 receives a basic transmission unit (for example, a first information bit) arranged in a plurality of frequency resources such as interlaced allocation. Further, the base station 100 detects a second information bit associated with the pattern applied to the received basic transmission unit.
- the terminal 200 can transmit the information bit to the base station 100 according to the pattern in addition to the basic transmission unit. Therefore, according to the present embodiment, for example, even when the basic transmission unit is repeatedly arranged in a plurality of frequency resources for transmission, the frequency utilization efficiency can be improved.
- the reception performance of the base station 100 can be improved by setting the elements in each frequency resource between the plurality of patterns to different values.
- the terminal 200 has, for example, in the basic transmission unit, different cyclic shift sequences (for example, sequence length 12, cyclic shifts # 0 to # 11) depending on the information bit. ) Is mapped.
- different cyclic shift sequences for example, sequence length 12, cyclic shifts # 0 to # 11
- the terminal 200 When transmitting a 1-bit information bit (for example, ACK / NACK), the terminal 200 transmits, for example, bit 0 (for example, NACK) with cyclic shift # 0 and bit 1 (for example, ACK) with cyclic shift #. Send at 6.
- bit 0 for example, NACK
- bit 1 for example, ACK
- the terminal 200 When transmitting a 2-bit information bit (for example, ACK / NACK), the terminal 200 transmits, for example, bit 00 (for example, NACK, NACK) with cyclic shift # 0, and bit 01 (for example, NACK, NACK).
- ACK is transmitted in cyclic shift # 3
- bit 11 for example, ACK, ACK
- bit 10 for example, ACK, NACK
- a cyclic shift set that does not include the same cyclic shift between patterns may be set in each frequency resource.
- the cyclic shift set corresponding to each frequency resource includes set # 0: ⁇ 0, 3, 6, 9 ⁇ , set # 1: ⁇ .
- a set such as 1, 4, 7, 10 ⁇ , or set # 2: ⁇ 2, 5, 8, 11 ⁇ may be included.
- the reception performance of the base station 100 can be improved by not setting the same cyclic shift between patterns in each frequency resource (in other words, by setting different cyclic shifts).
- the cyclic shift amount set in variation 1 is an example, and may be another value.
- the terminal 200 may repeatedly arrange a plurality of types of basic transmission units in a plurality of frequency resources. Then, the terminal 200 may apply, for example, a pattern associated with different information bits to different basic transmission units. In other words, the terminal 200 applies a pattern associated with different information bits to different basic transmission units arranged in a plurality of groups in which a plurality of frequency resources are divided.
- FIG. 14 shows an operation example according to the variation 2.
- the basic transmission unit # 0 is arranged in 5 RBs, and the basic transmission unit # 1 is arranged in the remaining 5 RBs.
- a different pattern is applied to each basic transmission unit.
- the terminal 200 can transmit a plurality of types of information bits using different patterns for each of the plurality of basic transmission units, so that the frequency utilization efficiency can be improved.
- the terminal 200 in one interlace, two bits of information bits are transmitted from the terminal 200 to the base station 100 by selecting one pattern.
- in one interlace in one interlace, 4-bit information bits are transmitted from the terminal 200 to the base station 100 by selecting two patterns.
- the elements included in the pattern applied to each basic transmission unit are, for example, a plurality of elements corresponding to a plurality of frequency resources (10 RBs in FIG. 14) (for example, FIG.
- the element included in the pattern shown in 9) may be divided into a pattern including an element applied to each of the plurality of basic transmission units.
- the pattern including 10 elements (circular shift amount) includes a pattern including 5 elements in the first half (a pattern applied to the basic transmission unit # 0) and 5 elements in the latter half. It may be divided into a included pattern (a pattern applied to the basic transmission unit # 1).
- FIGS. 9 and 14 the combination of elements corresponding to each of the 10 RBs included in one interlace is the same.
- the set of patterns shown in FIG. 9 is designed depending on the low PAPR / CM and the improvement of the reception performance of the base station 100. Therefore, even in the design of the pattern shown in FIG. 14, the characteristics of low PAPR / CM and the effect of improving the reception performance can be obtained.
- the number of frequency resources for example, the number of RBs
- each basic transmission unit is arranged.
- the number of frequency resources may vary between basic transmit units.
- each basic transmission unit is arranged in adjacent 5RBs among a plurality of frequency resources included in the interlace, but the present invention is not limited to this, and is included in the interlace, for example.
- Each basic transmission unit may be arranged in a distributed frequency resource among a plurality of frequency resources.
- the number of basic transmission units is two has been described, but the number of basic transmission units is not limited to two and may be any of three to N.
- each basic transmission unit As an example, the case where the pattern obtained by dividing the pattern shown in FIG. 9 is applied to each basic transmission unit is applied, but the pattern applied to each basic transmission unit is applied to this. It is not limited, and may be generated based on the size of each basic transmission unit.
- the variation 2 can be similarly applied to, for example, the pattern including the phase rotation and the series number in the element.
- the types of elements included in each of the patterns applied to the plurality of basic transmission units may be different.
- the pattern applied to the basic transmission unit # 0 may include a cyclic shift amount
- the pattern applied to the basic transmission unit # 1 may include a series number.
- the interlaced arrangement is described.
- the resource arrangement in the frequency domain is not limited to the interlaced arrangement.
- the method of determining the element string consisting of the cyclic shift amount or the series number in the pattern is not limited to the above-mentioned example of the element string (for example, FIG. 9 or FIG. 11).
- the cyclic shift amount or sequence number element sequence included in the pattern is generated by a pseudo-random sequence. May be done.
- uplink communication for transmitting a signal from the terminal to the base station is assumed.
- one embodiment of the present disclosure is not limited to this, and may be applied to downlink communication for transmitting a signal from a base station to a terminal, or communication between terminals (for example, sidelink communication).
- the downlink control channel, the downlink data channel, the uplink control channel, and the uplink data channel are not limited to PDCCH, PDSCH, PUCCH, and PUSCH, respectively, and may be control channels of other names.
- the unit of the time resource is not limited to the time resource (for example, slot or subslot) described in each of the above embodiments, and may be another time resource unit (for example, subframe or frame).
- Each functional block used in the description of the above embodiment is partially or wholly realized as an LSI which is an integrated circuit, and each process described in the above embodiment is partially or wholly. It may be controlled by one LSI or a combination of LSIs.
- the LSI may be composed of individual chips, or may be composed of one chip so as to include a part or all of the functional blocks.
- the LSI may include data input and output.
- LSIs may be referred to as ICs, system LSIs, super LSIs, and ultra LSIs depending on the degree of integration.
- the method of making an integrated circuit is not limited to LSI, and may be realized by a dedicated circuit, a general-purpose processor, or a dedicated processor. Further, an FPGA (Field Programmable Gate Array) that can be programmed after the LSI is manufactured, or a reconfigurable processor that can reconfigure the connection and settings of the circuit cells inside the LSI may be used.
- the present disclosure may be realized as digital processing or analog processing. Furthermore, if an integrated circuit technology that replaces an LSI appears due to advances in semiconductor technology or another technology derived from it, it is naturally possible to integrate functional blocks using that technology. There is a possibility of applying biotechnology.
- the communication device may include a wireless transmitter / receiver (transceiver) and a processing / control circuit.
- the wireless transmitter / receiver may include a receiver and a transmitter, or both as functions.
- the radio transmitter / receiver (transmitter, receiver) may include an RF (Radio Frequency) module and one or more antennas.
- the RF module may include an amplifier, an RF modulator / demodulator, or the like.
- Non-limiting examples of communication devices include telephones (mobile phones, smartphones, etc.), tablets, personal computers (PCs) (laptops, desktops, notebooks, etc.), cameras (digital stills / video cameras, etc.).
- Digital players digital audio / video players, etc.
- wearable devices wearable cameras, smart watches, tracking devices, etc.
- game consoles digital book readers
- telehealth telemedicines remote health Care / medicine prescription
- vehicles with communication functions or mobile transportation automobiles, airplanes, ships, etc.
- combinations of the above-mentioned various devices can be mentioned.
- Communication devices are not limited to those that are portable or mobile, but are not portable or fixed, any type of device, device, system, such as a smart home device (home appliances, lighting equipment, smart meters or Includes measuring instruments, control panels, etc.), vending machines, and any other "Things” that can exist on the IoT (Internet of Things) network.
- a smart home device home appliances, lighting equipment, smart meters or Includes measuring instruments, control panels, etc.
- vending machines and any other "Things” that can exist on the IoT (Internet of Things) network.
- Communication includes data communication using a combination of these, in addition to data communication using a cellular system, wireless LAN system, communication satellite system, etc.
- the communication device also includes devices such as controllers and sensors that are connected or connected to communication devices that perform the communication functions described in the present disclosure.
- devices such as controllers and sensors that are connected or connected to communication devices that perform the communication functions described in the present disclosure.
- controllers and sensors that generate control and data signals used by communication devices that perform the communication functions of the communication device.
- Communication devices also include infrastructure equipment that communicates with or controls these non-limiting devices, such as base stations, access points, and any other device, device, or system. ..
- the terminal applies a control circuit that applies a coefficient pattern associated with the second information to the first information arranged in a plurality of frequency resources, and the pattern.
- a transmission circuit for transmitting the first information is provided.
- the pattern includes a number of elements corresponding to the plurality of frequency resources.
- the element is any of a cyclic shift amount, a phase rotation amount, and a sequence number of a code sequence.
- the plurality of the elements included in the pattern have different values.
- the elements between the plurality of patterns have different values.
- the plurality of patterns are generated based on a common rule among the second information associated with each of the plurality of patterns.
- control circuit is associated with different second information with respect to different first information arranged in each of a plurality of groups in which the plurality of frequency resources are divided. The above pattern is applied.
- the format of the first information is either PUCCH format 0 or PUCCH format 1.
- the second information is a scheduling request.
- the plurality of frequency resources are resources included in the interlace.
- the base station has a receiving circuit that receives the first information arranged in a plurality of frequency resources, and a second that is associated with a coefficient pattern applied to the first information. It is provided with a control circuit for detecting the information of the above.
- the terminal applies a coefficient pattern associated with the second information to the first information arranged in the plurality of frequency resources, and applies the pattern.
- the applied first information is transmitted.
- the base station receives the first information arranged in the plurality of frequency resources, and is associated with the coefficient pattern applied to the first information. 2 information is detected.
- One embodiment of the present disclosure is useful for mobile communication systems.
- Base station 101 Base station 101, 205 Control unit 102 Upper control signal generation unit 103 Downlink control information generation unit 104, 206 Coding unit 105, 207 Modulation unit 106, 208 Signal allocation unit 107, 209 Transmission unit 108, 201 Reception unit 109, 202 Extraction unit 110, 203 Demodulation unit 111, 204 Decoding unit 200 Terminal
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Abstract
Description
アンライセンス周波数帯の上りリンク送信では、例えば、端末(例えば、UE:User Equipmentとも呼ぶ)の送信帯域幅(例えば、OCB:Occupied Channel Bandwidth)が、規定の帯域幅以上に制限されることが想定される。NR-Uでは、例えば、端末の上りリンク送信のためのチャネルに対して、インターレース割当(又は、インターレース送信とも呼ぶ)の適用が検討されている。なお、上りリンク送信のためのチャネルには、例えば、上りリンクデータチャネル(例えば、PUSCH:Physical Uplink Shared Channel)又は上りリンク制御チャネル(例えば、PUCCH:Physical Uplink Control Channel)が含まれてよい。
NRでは、端末は上りリンク制御チャネル(例えば、PUCCH)を用いて、上りリンク制御情報(UCI)を基地局(例えば、gNB又はeNBとも呼ぶ)へ送信する。UCIには、例えば、下りリンクデータ信号(例えば、PDSCH:Physical Downlink Shared Channel)の誤り検出結果を示す応答信号(例えば、ACK/NACK:Acknowledgement/Negative Acknowledgement、又はHARQ-ACKとも呼ぶ)、下りリンクのチャネル状態情報(例えば、CSI:Channel State Information)、又は、上りリンクの無線リソース割当要求(例えば、SR:Scheduling Request)が含まれてよい。
NR-Uでも、端末が1又は2ビットのUCIを送信する場合、PUCCH format 0又はPUCCH format 1を用いることが想定される。
本開示の各実施の形態に係る通信システムは、基地局100及び端末200を備える。
図5は、実施の形態1に係る基地局100の構成例を示すブロック図である。図5において、基地局100は、制御部101と、上位制御信号生成部102と、下りリンク制御情報生成部103と、符号化部104と、変調部105と、信号割当部106と、送信部107と、受信部108と、抽出部109と、復調部110と、復号部111と、を有する。例えば、図5に示す制御部101、復調部110及び復号部111は、図3に示す制御部に相当し、図5に示す受信部108は、図3に示す受信部に相当してよい。
図6は、本開示の一実施例に係る端末200の構成例を示すブロック図である。例えば、図6において、端末200は、受信部201と、抽出部202と、復調部203と、復号部204と、制御部205と、符号化部206と、変調部207と、信号割当部208と、送信部209と、を有する。例えば、図6に示す制御部205、符号化部206、変調部207及び信号割当部208は、図4に示す制御部に相当し、図6に示す送信部209は、図4に示す送信部に相当してよい。
以上の構成を有する基地局100及び端末200における動作例について説明する。
次に、基本送信ユニットの生成例について説明する。
PUCCH format 0では、送信側(例えば、端末200)は、例えば、1OFDMシンボル及び1RB(例えば、12サブキャリア)に対して、情報ビットに応じて互いに異なる巡回シフト系列(例えば、系列長12)をマッピングした信号を送信する。
PUCCH format 1の信号は、例えば、4~14OFDMシンボル及び1RB(例えば、12サブキャリア)で構成される。
端末200は、例えば、生成した基本送信ユニットを、複数の周波数リソース(例えば、インターレースに含まれる各RB)に繰り返して配置する。
m'(n) = m + Δn mod MRB (1)
u'(n) = u + δn mod U (2)
u'(n) = Zn (3)
端末200は、基本送信ユニットに含まれる情報ビット、及び、パターンに対応付けられた情報ビットを基地局100へ送信する。換言すると、端末200は、基本送信ユニットによって情報ビット(例えば、第1の情報)を明示的に基地局100へ送信し、パターンの選択によって情報ビット(例えば、第2の情報)を暗示的に基地局100へ送信する。
パターン#1(P1と表す): [0 1 2 3 4 5 6 7 8 9]
パターン#2(P2と表す): [0 2 4 6 8 10 0 2 4 6]
パターン#3(P3と表す): [0 3 6 9 0 3 6 9 0 3]
パターン#4(P4と表す): [0 4 8 0 4 8 0 4 8 0]
パターン#5(P5と表す): [0 5 10 3 8 1 6 11 4 9]
パターン#6(P6と表す): [0 6 0 6 0 6 0 6 0 6]
m'(n)=m+(n+b) mod MRB (4)
次に、端末200が基本送信ユニットに含まれる情報ビット及びパターンに対応付けられる情報ビットを送信するユースケースの例について説明する。
動作例1では、PUCCH format 0を用いてACK/NACKが送信され、ACK/NACKに割り当てられたPUCCHリソースとSRに設定されたPUCCHリソースとが時間的に重なる場合の動作について説明する。
動作例2では、SRに設定されたPUCCHリソースがPUCCH format 1であり、PUCCH format 1を用いてACK/NACKが送信され、ACK/NACKに割り当てられたPUCCHリソースとSRに設定されたPUCCHリソースとが時間的に重なる場合の動作について説明する。
動作例3では、SRに設定されたPUCCHリソースがPUCCH format 0であり、PUCCH format 1を用いてACK/NACKが送信され、ACK/NACKに割り当てられたPUCCHリソースとSRに設定されたPUCCHリソースとが時間的に重なる場合の動作について説明する。
PUCCH format 0に基づいて基本送信ユニットが生成される場合、端末200は、基本送信ユニットにおいて、例えば、情報ビットに応じて互いに異なる巡回シフト系列(例えば、系列長12、巡回シフト#0~#11)をマッピングする。
上記実施の形態では、端末200が、例えば、インターレースといった複数の周波数リソースにおいて、1つ(換言すると、1種類)の基本送信ユニットを繰り返し配置する場合について説明したが、これに限定されない。
なお、上記実施の形態では、周波数領域のリソース配置の一例として、インターレース配置について説明した、周波数領域のリソース配置はインターレース配置に限定されない。
101,205 制御部
102 上位制御信号生成部
103 下りリンク制御情報生成部
104,206 符号化部
105,207 変調部
106,208 信号割当部
107,209 送信部
108,201 受信部
109,202 抽出部
110,203 復調部
111,204 復号部
200 端末
Claims (13)
- 複数の周波数リソースに配置される第1の情報に対して、第2の情報に対応付けられた係数のパターンを適用する制御回路と、
前記パターンを適用した前記第1の情報を送信する送信回路と、
を具備する端末。 - 前記パターンには、前記複数の周波数リソースに対応する個数の要素が含まれる、
請求項1に記載の端末。 - 前記要素は、巡回シフト量、位相回転量、及び、符号系列の系列番号の何れかである、
請求項2に記載の端末。 - 前記パターンに含まれる複数の前記要素は互いに異なる値である、
請求項2に記載の端末。 - 前記複数の周波数リソースの各々において、前記パターンの複数の候補間の前記要素は互いに異なる値である、
請求項2に記載の端末。 - 前記パターンの複数の候補は、前記複数の候補それぞれに対応付けられる前記第2の情報の値に対して共通の法則に基づいて生成される、
請求項1に記載の端末。 - 前記制御回路は、前記複数の周波数リソースを分割した複数のグループ毎に配置される異なる前記第1の情報に対して、異なる前記第2の情報にそれぞれ対応付けられた前記パターンを適用する、
請求項1に記載の端末。 - 前記第1の情報のフォーマットは、PUCCH format 0及びPUCCH format 1の何れかである、
請求項1に記載の端末。 - 前記第2の情報は、スケジューリングリクエストである、
請求項8に記載の端末。 - 前記複数の周波数リソースは、インターレースに含まれるリソースである、
請求項1に記載の端末。 - 複数の周波数リソースに配置される第1の情報を受信する受信回路と、
前記第1の情報に適用された係数のパターンに対応付けられた第2の情報を検出する制御回路と、
を具備する基地局。 - 端末は、
複数の周波数リソースに配置される第1の情報に対して、第2の情報に対応付けられた係数のパターンを適用し、
前記パターンを適用した前記第1の情報を送信する、
送信方法。 - 基地局は、
複数の周波数リソースに配置される第1の情報を受信し、
前記第1の情報に適用された係数のパターンに対応付けられた第2の情報を検出する、
受信方法。
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